Acoustical Imaging of Earth Near-Surface Inhomogeneities by an Echographic Technique
The exploration of near-surface structure and inhomogeneities of the earth presents further difficulties in comparison with deeper pro — spectings such as those performed for oil explorations. A difficulty concerns the seismic source itself, and is due to the problem of transmitting acoustic waves into the ground according to suitably high frequencies. Another difficulty is caused by the inadequacy of common receiving devices in detecting P-waves reflected from small shallow ano malies.
KeywordsPropa Tungsten Geophysics Flange Acoustics
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